Sewing-machine.



s. WgNELSON; SEWING MACHINE. APPLICATION FILED IAY2I. I912;

I is,

I s I:

maex I I I Inn/enter;

'Patenmd Jan. 8,-1918.;

e..w. .NELSON.

SEWING MACHINE. APPLICATION FILED a snirs-suin 2.

s. w. NELSON. sswm'c mcmne.

7 APPLICATION FILED IMYZI. I912- enonen w] mean, or cnnvnnmn, 01:10,cmvnmnn,

of various types'the main features Cleveland, in the county of CuyahogState of Ohio, have invented certain new mcnnm comrm, or

assrenon To [run s'rnmmn snwm'e 01110,; conrona'non or 0:810.

snwnte-naenmn.

To all whom it may concern Be it known that I, Gnonon W. NEIBON,

citizen of the United States, and'resident 05 a an and usefulImprovements in Sewing-Machines, of which the following is aspecification. V

This invention relates to sewing machines, and particularl. to" thatclass ofsewing machi es in wh d su ess e r up sries ofstitches are madeat separated points'in thework, as for example, in hntton sewingmachines, etc. a

While certain features of the present invention are applicable to sewingmachines of the invention are especially adapted to 'ma-' chines of theclass justmentioned for form- H this class'it is customary on thecompletion of {a group ing series or groups of stitches at separatedpoints in the wor and particularl to Ina-- chines of this class in whicha sing e thread is used, that isto say, in button sewing and similarmachines for forming groups of chain-stitches. In chain-stitch machinesof w sever the thread orseries of stitches bya suitable" means under thecontrol of the operator.

in such chain-stitch machines provision a preferably'should bemade forcertainnecesw m ipn e n of the thre r b that means from thesourc'e of sn85x be employed for pullingofi of thread to."pe rinit t e forming ofthe}7 I stitch ofaeseries without drawing down the end of the thread belowthe upper surface I i of the work, lthat *the length of the threadbeyond the needle eye "at the beginning of the makingof suclra seriesefstitches should be,;,determined in order that ther ma be Qno excessthread beyond whatis necessary 681,208; filed. closed a machine of t'hissame, so far.

for the formation ofthe first stitch, and that.

; o n the-completion of=a; seriesor. cup-of ing in the material 0 suchstitches the-"end of the threa remaintied or knotted in or r topreventraveling out of the, stitches.

In a prior application of mine, Serial No.

March2,1 1912, there, is disas the structure"and general organization ofits parts are concerned, and in, which means Lil-1'6 prov ded tor,controlling with precision the amount of thread drawn of! ISpecification of Letter-is Patent.

Application. ma Key 21, 1912. sum in. 698,690.

.It has been found that rated upon should be I Patented Jan.s, ,1918;

irom, the

series or roup and for also regulati L the length of ng yond the eye ofavoiding the use of each new series. In the machine of, said applicationa thread-restrainin device or thread-clamp is associated with suitablepull-off; means and with a work-holder in such a manner that on thecompletion of a series of stitches, and before the severing of .be drawnoff from thesour'ce ofvsupply to permit the proper formation of thefirst stitch of the nextserics,

supply for the first stitch of a the thread, a 'sufiicient length ofthread may I ear-sew. omenthe end of thread extendinghbef oi the needle,for the purpose of an excessive amount so of thread in making the firststitch or loop after which the thread is broken'and the severed endoithe Y thread is drawn back untilthe'p'ortion be yond-theeye :of theneedle is; substantially ]\1St sufiiclcntto permit the firststitch ofthe {new series to be application, however, the device- 01 thread-clammeans, which include "asonezof its functions thedrawing back of thesevered end of the thread, were associated and connectedthreadrestrainin with the work-holder for actuation by the operatorafter the automatic stopping of the machine at the endofaseriesofstitches.,

, In the present-machine the principal devices jnst referred to,

"properly formed: m In said and the pull-o p V, to ,a threadrestralning' device for clamping "the thieadzatp a suitable timeafterthefcompletioii of a,

drawing rfiff from"the, source of supply. a

series" ef stitches, and pull-elf means for sufiicient length of threadfor thefirst loo p y of a -hew series,and for also drawing-b e towardthesource severed; thread,

the. rincipal chines of the prior art,

vof these functions of clamping theread beencoin'pleted and thea'ctionoIf the'needlebar mechanism is-substantiallyfinis'hed and "befo ejthnext series" is started. I pthep wordgthe' machine isdisting l'fihed pfltlon m m-y irointha't ofsaid prior of supply 7 the end jof the" v maybe retained", but 1 feature which distingu1shes.,-a5 this "inventionfrom that of said prior ape plication and in general from other 1 1a isthe employment of means for automatically,performinggeach andpull-ingofithe thread in oneldirection or therotherafter'oneseriesof'stitcheshas of the fact that antoniat'ic' instead fof'manilalzmeans isemployed forpertorm ingggertainrunctions'whichfwem,iornierly iie" 20 hasibeen rclamped,

Y manually related to operation of severing the thread, but which inthe. present 11.1%-

. 7 chine aremahually unrelated to the threadsevering-function, and areseparated there r 6 from lantl- ,erformed whollyv automatically withoutre erence to'when the'severing op eration rnaytakeiplace.

,Another. feature of the invention relates ,to'the; ofthes'e variousautomatically 7 1 10; controlled operations just referred to.

' threfad restraining device of the aforesaid The application was timedto come into action from the' sourr'm ofsupplly of sufficient thread -15x-for the formation of t efirst loop of a new series; Infthe presentcase, however, this threadtstrainih'g device is timed to permit deviceto. draw-bfi this amount of from-the supply after the thread and-to pulloff the thread from'a' point inthe rear ofjthat atwhich the threadis'clamped, instead of from a point :in' advance of the thread clampingdevice as was the case in said rior applica- 25tion. Furthermore, thethree -clamp of the machine preferably engages and olds thethread-at apointfon the face-plate I -oftthe-inachine and at a comparatively shortfrom the needle,- so that but a short 1 V so. ,--1ei1 gth of threadlocatedbetween the two ge es-whenc i su a a y ed before it; isfsevered.

' "Otheji'f-fea tures of therinve ntion not hereinbeforejreferredto willbe herei after 'de- 'ed an'd than" of sewing of them are ape orally3}?)11081118 to that class of sewing machines or or'ming groups ofseparated stitches, and particularly to button-sewing machines, forwhich reasons the various featur'espf the invention are illustrated inthe draw ngs as embodied in. a button-sewing mach ne. Most of the partsof this machine are or may be similar to those of other button-sewingmachines heretofore used, such for exam 1e, as the Standard button-sewmgmac inc, and particularly to those of the specific type of Standard?machine shown in the a oresai'd application. In the constructionillustrated the main frame comprises upper and lower portions, 2 andsuitably connected and containing suit- 3 .ahle chambers, bearings ete,for the various operating arts. The main driven member, for examp e, isshown-as a fast disk, 4, associated with a loose pulley, 5, these being,as usual, in the form of hand-wheels. to ermit them to be readily maniulated. he disk 4 is carried by a suitab e main shaft (not shown) havingat its extreme forward end alooper, such as 7, of well-known chainstitchtype. Associated with the disk Land pulley 5 is so'me'suitable meansforstarting and stopping the machine; 8 and 9 designate respectively theusual needle and needlerbar, the latter of which is intended -.tobeoperated from the main shaft .,sub-. stantially in the well-knownmanner. ,Suitable 'r'neans are also employed for eifecting thetensioning, taking-up and guiding of the" thread in the normal operationof forming suecess1"" "ve stitches, 11 and 12 indicating a pair oftension devices locatedon the button-sewing ma hme, 'in p on they r a.w" siau mms apping issass,=o .v I hereinbefore "reh m s 1 the :same110811310118 as of :thezi'liachine', with the t r l" rams t re" and 1 0etin the, three eelemp s ev e. m n e.

tia

of the machine ,arm, the second being the usual automatic tensiondeities, while 13. is 'a-jt esp-fl a ed and a es ythe needs-bar,anal-'4, 15, 16; 1T'and 18 'are a eries of for properlydii c gz he tread n i pass ge fr m ours e he' fl e, b ng e s bs anrim rcoh r io anrew; {as found ,in machines oflthis machinesthere is also adjacenttdtheneed and. looper a suitabIe-work holder or but clamp, which is ormay be suhstan al similar tothose of prior machinesQanj' tieularly tothat shown in the aforesaid pplieation, this button-clamp "being desigfnated, f ner'all'y by H.

. Refs ,ingflfirstto Figs. 1 and"2, t in the needleathrea-d', which inthis eas I machine. This thread is passed thro ,gnides, tension devicea-j take-up d 1n the mannerillustr'ated'in the -v 'le thread "f a.chain-stitch button sew In o in'juxtaposition with the. forward side ofbriefly" described.

machine on the work, and at the beginning,

On the st ping of the machine the operator thenvusua 1y has to performone or more operations manuallyin order to complete the ork being doneat one point. in the length ofthe material. operated upon, and

then has to shift thework to a new position.

Before considering in detail the manner in which thethreadis to be actedupon on the stoppingfof the machine, the" mechanism pre erably employedfor bringing about the automatic stopping of the machine'will be,

A A "the beginning of the operation of. the

of theoperation of making any new series or group of stitches in thework, as, for example, in sewing on a button, such as b, the

mechanism for starting and stopping the machine will be in the, positionshown in. Fig. 1. The main element of this mecha nism is, of course, thedisk 4. In the present case, asv in the aforesaid prior application,

this disk is intended to be engaged at oppositesides thereof when themachine is to be automatically stopped. Two braking surfaces iareprovided for this purpose, which surfaces are of course clear of thedriven-1v member 4 when the machine is in operation.

\ They serve to clamp the disk 4 between them at the proper moment, thisaction being preferably controlled by a strong-spring for applying-themsubstantiallyinstantaneously I to opposite sides of the disk 4-'When themachine is to be stopped. Here the disk 4 and pulley 5 are forced intoengagement with each other by'a suitablersta-rtin lever, 19, having inline with the center 0 the pulley 5 a cone-pointed pin, 20, holding thetwo r intended to be moved together in opposite pulleys firmly togetherduring the time that the operator desires the machine to be runninAnother lever, such as 21, of substantial y ringform, surrounds the disk4 and pulley 5 and is substantially parallelwith I p the lever 19. Thesetwo leversare pivoted at their lower ends to the lower frame portion 3of the machine. At its upper end the starting lever 19 has a forwardlyand downwardly extending or overhanging arm, 22,

the inner face of the depending portion of which carriesa suitablebraking device, 23,

the'disk 4. The ring-shaped lever 21 has near its upper side acorresponding braking device, 24. The two levers 1 9 and 21 and thebraking devices or pads carried thereby are directions, the mainportions moving away from each other to apply the brake and to-\vardf'each other when the brake is removed and the pulleys coupledtogether. Any suitable means may be employed for operating vsaid leversin this manner, provided it is such' as to effect a quick and powerfulapplication of the brake. Here a toggle connection is combined with astrong spring, 25,

the spring serving to apply the braking de-; vices quickly to the disk4hwhile the toggle serves to obtain apowerful grip through said brakingdevices upon opposites; sides of said disk. The togg e connection showncom rises links, 26 and 27, connected respec-' tive y to the startinglever 19 and to a fixed point on the upper frame member 2. At

their point of connectionthese links. are also pivoted to athird link,28, the upper end of which is pivoted to a rock-arm, 29, on arock-shaft, 30, journale'd in lugs at the upper rear end'of themainframe 2. This rock-I shaft also has secured toits frontend tworock-arms, 31and 32, and at its rear enda rocking pawl, 33. The rock-arm31" is in;

tended to be operated by connections'from a treadle or other suitablepart to start the machine, while the pawl 33 constitutes one element ofa holding device or detent adapt ed to beengag'edfl by a complementaryelement, such as the hooked upper end 34, of a long lever, ,35, pivotednear its center on a suitable fixed part of the frame and havingitslower end faced or beveled, as indicated at '36, to cooperate withtripping means for 1 L bringing abouttheautomatic stopping ofthe'machine. The rock-arm 32 is connected by meansof a rod,-37,'""to thefree end ofa rock-arm 38" secured'to one end ofa rockshaft, 38,journaled in bearings at the rear 38" for operating a pair ofsubstantially horizontal links, 39, the rear ends of which are connectedto the ring-shaped lever 21.

near the upper end thereof. The construction and organization of theseparts are such that when the starting lever ismoved. rearwardly or in adirection to release the driv ing'pulley from the driven disk the toggleis straightened and at the same time the links end ofthe'machine.andcarrylng eccentrics 39 are moved forward slightly,theirmove- 'ment being small as compared with the rear' ward movement ofthe starting lever, and

the two braking devices 23 and 24 are brought instantaneouslyand withpowerful a combined spring and toggle act pn' into osite. sides ofbraking engagement with o i the disk 4 to stop the mac me. The machineisintendedto be, stop ed each time :with all of the parts in a pretermined position, to wit, with the take-up 13 in a raised position andthe needle at-or about the limit of its up stroke, in readinessforthetaking of 1 the first stitch of the next succeeding series. Themeans used is a-wedge, such as 4',- on 1' the disk 4 for increasing thefriction opposed eter-' to the rotation of the parts at a pre minedpoint. It cooperates with the braking I i 125 the braking surfaces andbring the Inal- V gradllg ated action, to a stop at theexact pointdesired. To start the machine'the o ra'tor devices 23 and 24 to wedgethefidisk between chine quickly, but with a properly presses a treadleorotherdevice and t rough mediately brin 34 of the lever 35, when it isengaged b a hook said hook, as-shown in Fig. 1, sai being normallyforced toward saidpawl, as

by means of a spring 40. This movement of the rock-arm 31, etc., servesto strike the toggle and withdraw the braking devices from the oppositefaces of the disk 4, and in these positions the parts are held as justdescribed until the lever 35 is tripped automatically on the completionof a predetermined series or group of stitches.

Any suitable meansmay be employed for tripping this lever. Preferablythe tripping means is operated from the main shaft (not shown). througha cross-shaft 41, driven from said main shaft by gearing (not shown) bymeans of which a relatively slow rotary movement is imparted to this,crossshaft. On the completion of the predetermined grou of stitches thecross-shaft is intended to ring into operation a releasing device. Thisreleasing device is shown as carried by a disk, 42, and 1s in the formof a radial pin, 43, slidable in and out of operative position andsuitably held in place. When projected into the position shown in Fig. 1the pin serves to trip the lever 35 automatically once at each rotationof the disk. When not pro'ected the ma:

chine may be used for straig t-away stitching. When the pin 43 reachesthe position shown in Fig. 2 it rides over one of the beveled faces atthe end 36 of the lever 35 and rocks said lever, releasing it from thepawl 33, whereupon the spring 25 will imabout the automatic stop-- pirig of the mac ine as reviously described.

he parts just s eci-cally described are, as before stated, su bstantiallthose of previous machinesof this genera class and ticularly of themachine shown in the a o said application. From any .suitablepart of themechanism so described the automatic control ofthe thread-clamping andpull-off devices before referred to may be effected. In thisconstruction, however, the automatic stop mechanism of said rior machineis utilized for this purpose. n order that it may be so used the shaft30 is illustrated as having in addition to the parts previouslymentioned, a cam,44, movable from the position shown in Fig. 1 to thatillustrated in Fig. 2 for the purpose of actuating connections betweensaid cam and the thread-clamp, pullofi devices, etc. The connectionsemployed may be any suitable for the purpose, 'rovided that the timin ofthe operation 0 the arts actuated there y is that which is hereindescribed. The specific connections shown comprise a lever, 45, securedma fixture at the upper rear end of the frame of the ma.-

chine and the lower end of which cofiperates dlrectly with the cam 44while the upper end is in position for engaging and actuating acontrolling member, such as a rod 46, mounted to slide inguide-wayppreferably at the upper side of the mac inc and extending fromthe front to the rear thereof. Various guides for said rod are indicatedat 47 48 and 49. A stop is shown at 50 for limiting the rearwardmovement of this rod, the forward movement being determined by the throwof the lever 45. In this construction the rod 46 constitutes theimmediate actuator for various elements in which the main features ofvthe present invention are embodied. One of these is a suitablethreadclamp for clamping the thread automatically on the comp etion' ofa predetermined group of stitches and the consequent stoppm of the feedmovement of the thread,

whi e another is apull-ofi device for auto- 1 matically pulling ofi fromthe source of supply a suitable length of thread for the first stitch ofa new series, and two others shown are a device for automaticallyreleasin the automatic tension device of the machine and a pull-ofl"device in"the-form of a, check-spring for automatically drawing upthrough the e e of the needle the long depending severe end of the'thread after said thread has been properly clamped and severed.

In the machine shown in the aforesaid application the thread-clamp andpull-oil .devices were manually actuated by the. operator in predetermintiming and the thread was severed after such manual clamping of thethread following the completion of a group of stitches and the knottingof the thread. In the present machine these devices are not operatedmanually but automatically in predetermined timing, and the functions ofclamping the thread and pulling, oif thread for the first stitch of anew series are entirely separated from the function of after theclamping and pulling ofi operations have been fimshed. 1:

The thread-restraining device'or thread clamp for clamping the thread onthe commanually severing the thread, lwhich; severmg operation may takeplace at "any; time pletion of the predetermined group of stitches maybe of any suitable type, but is here shown as comprising fix which isfixed to the front plate of the ma:

chine, while the latter is illustrated as form- '5 and 6.)-

ed and movable p g j w 52 and 5a, the former of At its upper end thisangle ever has an opening in which the actuatingrod 46 works, themovement of this lever being controlled by said and by a spring, 57,thereon .workin between the upper end of the lever which 1s normallystopped against a head, 58, at the forward end 'of said rod and suitablefixed stop. In the normal position, shown in Figs. 1 and 6, thisthreadrestraining device or thread-clamp is open .tion shown in and. therod is in its retracted pos'itlonn When the detent 33 is released,however, said rod is shifted uickly forward to the posiigs. 2 and 5 inwhich "the spring 57, which actuates it to that position,

holds-the mo able member of the threadrestralning device against thefixed member 52. and clamps the thread in place be tween them; Thcthreadis, of course, released by the return of the rod to its normal 3position, that is, by the resetting of the Pa s I J a The rod 46 alsocarries in this casemeans for operating, a "pull -ofi device for pullingoff sufiicient thread for the first stitch of anew group or series. Thispull-oil device also may be any suitable for the purpose.

It is illustrated at 59 as an angle-lever movable in a substantiallyhorizontalvplane a and having a vertical finger, 60, for engaging thethread and pulling itaside from 1ts normal position to the dotted lineposition indicated in Fig, 4 topull oil the necessary length of'thread.The short arm of thislever isshown as. bent and pierced for thereceptionof the adjacent portionfof the putunder compression between afixed stop red 46, a spring for normally holding this pull-01f device,in, the full-line position shown in Fig. 4, beingillustrated at 61. Asshown, this spring is normally extended to hold the pull-01f deviceinthe position indicated by full lines in Fig. :4. When the pawl 33 is.tripped, however, said spring is face on the head of the machine and astop face on the rod 46. The stop on the rod is preferably adjustableand is illustrated at 62 in colnjunction with means, such- 63, forlocking it in any deSll'fldfldJllStBd position fora-e lating the lengthof throw of'tlie pull-off evice and thereby the length of thread drawnoil from the spool or thread-supply. It will beobvious that the spring61 Wlll bereleased and, expanding, willrestore the pull-off device toits nor- A mal position when the parts are reset for a: new series ofstitches, as shown in Fig. 1. The automatic tension device 12 at the.momentithe' pufisofl' device 59 is operated to matic tension device12for the purpose of,

releasing the tension. Normally this deviceis retracted to a position inwhich it exervice, in the form o cises no control over the automatictension device, it being held in tlllSjllOIIIlfil position,

as, for example, "by means of: a suitable spring, 65, between a cheekofthe combined a v guide and bearing'48 and one face of the releasingdevice itself. Normally this spring is extended as shown in' Fig. 1, butwhen the machine is stopped b the tripping of the detent 33it is put uner compression as illustrated in Fig. 2.

In addition to the thread-clamp, the main pull-01f device, and therelease for the automatic tension device just described, the con,-trolling rod 46 also preferably governs; the

o eration of another ull-ofl' or take-up de- I a check-spring, forpulling back the thread t through the eye of the needle a predetermineddistance after the same has been severedat' the work. The deviceemployed for this purpose is shown in detail at 66 in Figs. 5 and 6,from which it will be seen that it will operate during the regularoperation of the machineto perform the usual function of a check spring,a

that is, controlling or taking up slack thread during the descent. ofthe needle, and "also serves, on the severing of the thread at the work,to perform the additional function of pulling back the severed end ofthe thread through the eye of theineedle until only asuflicient length.of thread is left beyond said eye to permit. the proper formation ofthe'firststitchof a newseries. v

From the foregoing description of the thread-clamp, thepull-oif devices,and'the release for the automatictension device, 1t

will be seen that the rod 46 exercises, a through the action of asuitable part of the mechanism of the machine, which in this instance isthe stop motion, an automatic control over the action of all of theseparts which are therefore caused to operate 1n a predetermined timing.The timing in I this case is such that on thejcompletion ofthepredetermined series or group of stitches,

anism is substantially finished,the thread is first clamped by thethread restraining device 52- 5 3, the automatic tension 12 is thenreleased,the pull-ofi device 59"between' this tension device and thethread-clamp is actuated to the position shown in dotted lines in Fig. 4to draw 05 fromthe source" of supply a suitable length of thread, andthe sec ond plull-ofi device, or check-spring, is brou t into positionand ut under tension (see i 2) so that .it wi 1 be in condition for uling up the loose end "of out e severingof the same. a

The severing of the thread ma be performed substantially infthe usuamanner,

the; thread that is to say, by a suitable manual 'or 110 a and when theaction of theneedle-barmechtreadle connection to the usual 0 cratinglever, 67, connected to the buttonamp by a suitableconnection Theseverance of, said thread close to the under side ofthe work- What Iclaim is 1. A sewing machine, comprisin means for forming a group ofstitches sai means including a needle, a work-holder, means for severingthe thread, a thread-restraining device cooperating with said severingmeans located in positlon for clamping the thread at a point above saidneedle, and automatic means for rendering said thread-restraining deviceefiective on the completion of saldgroup of stitches and the stopping ofthee-feed of the thread.

2. A sewing machine, comprisi means for forming a oup of stitches saimeans including a nee 1e, a,work-holder, means for severing the thread,a thread-restraining de vice cooperating with said severing meanslocated in position for clamping the thread at a point above saidneedle, and automatic means governed by said stitch-forming means forrendering said thread-restrainin device efiective on the com' letion ofsai grou of stitches and when e action of the need e-bar mechanism issubstantially finished.

3. A sewing machine, compris' means for forming a cup of stitches saimeans including a ne e, a work-holder, means for severing the thread bythe lifting of said w-orkholder, a normall inefiective threadrestrainingdevice opera le independently of said severing means located in positionfor clamping the thread at a point above said needle, and ,automaticmeansgoverned by said stitch-forming means for rendering saidthread-restraining device efiective on the completion of said group ofstitches and when the action of the needle-bar mechanism is substantiallfinished.

4. A sewing mac ine, comp'risingmeans for forming a group of stitches, aworkholder, means or severing the thread, a thread-restraining devicecooperating with said thread severing means, a pull-01f deviceindependent of said thread restraining device, and automatic means forrendering said thread-restraining and ull-oif devices elfective on thecompletion 0 said group of stitches. v

5. A sewing machine, comprising means for forming a grou of stitches, aworkholder, means for li ing said work-holder, a thread-restrainingdevice to positively clamp the thread, a pull-off device between whichand the work-holder said thread-restraining device is located, andautomatic means for rendering said thread-restrainin device efiective onthe'completion of sai groupof stitches 6. A sewing machine, comprisingmeans for forming a of stitches, a workholder, means athread-restraining device to positively clam the thread, a pull-ofidevice between which and the work-holder said thread-restraining deviceis located, and automatic means for rendering said thread-restrainingand pull-01f devices efl'ective on the completion of said group ofstitches.

7. A sewing machine, comprising means for forming successive groups ofstitches said means including a needle, a workholder and means forautomatically stopping the machine upon the completion of each group ofstitches, in combination with a thread-restraining device to positivelyclam the thread at a int above the needle, a flu -olf device, an meansfor automatica y rendering said thread-restrainin and pull-olf devicessuccessively efl'ective 1n the order named upon the completion of eachgroup of stitches.-

8. A sewing machine, comprising means for forming successive groups ofstitches said means including a needle, a workholder, and means forautomatically stopping the machine upon the completion of each group ofstitches, in combination with a thread-restraining device to itivelyclam the thread at a point above t e needle, a p Loif device betweenwhich and the work-holder said thread-restraining device is located, andmeans for automatically rendering said thread-restraining and pullofl'devices successivel efl'ective 1n the order named upon the comp etion ofeach group of stitches.

9. A sewing machine, comprising means for forming suve grou s ofstitches said means including a n la a work-,

holder, and means for automat cally stopping the machine upon thecompletion of each group of stitches, in combination with athread-restraining device to positively clamp the thread at a pointabove t e needle, a ull-ofi device operatively connected with saidthread-restraini device, and means for automatically ren ering saidthread-restraining and pull-off devices successively effective in theorder named upon the completion of each group of stitches.

10. A sewing machine, comprising means for forming successive groupsofstitches said means including a needle, a workholder, and means forautomatically stopping the machine upon the completion of each groupofstitches, in combination with a thread-restraining device topositively clamp thethread at a point above the needle, :1 pull-0Edevice connected with said thread-restraining device and between whichpull-off device and the work-holder said thread-restraining device islocated, and means 'for' automatically rendering said u f r liiting saidwork-holder,

cessively effective in the order named upon thread-restraining andpull-off devices suc the completion of eachgroup of stitches.

11, A sewing machine, comprisin means for forming a group of stitchessai means including a needle, means for automatically stopping themachine upon thecompletion of said'group of stitches, means for severingthe thread, and automatic means operative subsequent to the stopping ofthe machine 1 and prior to the restarting of the same for pulling thesevered end of the thread backward through the eye of the needle a predetermined distance. a

" 12. A single thread sewing machine, comprising means for forming agroup of stitches said means including aneedle, means for automaticallystopping the machine on the completion of said group of stitches, meansfor severing the thread at the under side of the work, andautomatic'means operative subsequentto the stopping of the ma- 1 chineand prior to the restartin of the same for pulling the severed end 0 thethread backward through the eyeof the needle a predetermined distance.

13. Asewing machine, comprisin means I for forming a groupof stitchessai means for. forming a group of stitches sai including a needle, awork-holder, meansfor severing the thread, a thread-restrainingdevice, atake-up device for pulling the severed end of the'thread backwardthrough the eye of the needle a predetermined distance, and

-means for automatically rendering .said

thread-restraining and take-up devices suc+ cessively efi'ective in theorder named on the completion of said up of stitches.

14. A sewing mac ine, comprisin means for forming a group of stitchessai means including a needle, a work-holder, means for severing thethread, a thread-restraining ide a vice, a spring take-up device forpulling the severed end of the threadbackward through the eye of. theneedle a predetermined dlstance,and means for automaticall renderingsaid thread-restraining and ta e-up devices successiveljy effective inthe order named 3 on the completion of said group of stitches.

15. A sewing machine, comprisin means means including a needle,a,workholder, means for .severing the thread, a thread-restrainingdevice, a pull-oif device in the rear of said thread-restraining device,a take-up device in front of said thread-restraining device for pullingthe severed end ofethe thread backi ward through the eye of the needleapre determined distance, and means for automaticall renderlng saidthread-restraining, pull -,0 and takeup devices successively effectivein the order named on the completion of said groupof stitches,

v16. A sewing machine,.comprising means for forming a group ofstitches'and severing the thread on the completion of the'stitches ofsaid group, a thread-restraining device, and automatic 'means m the rearof the hread-restralnm devlceand operative on )the completion 0 saidroup for pulling off thread for a stitch w ile said thread-re.istrainiiig device is in its effective position, and automatic means infront of said threadrestraining device for. pulling back the severed endof said threadautomatically while I the thread restraining device is insaid posit1on. p H

17. A sewing machlne, comprising means for forming a group of stitches,an'automatic'tension device, a work-holder thread severing means, andautomatic meansinde pendent of said thread severing means for clampingthe thread at the end of a roup of stitches and for pulling ofl thread1n the rear of said clamping point; while the auto matic tension device1s inits ineffective position.

18. A sewing machine, comprising means for forming a group of stitches,an automatic tension device, a work-holder thread severing means,athread-clamp independent of said thread severing advance"of'the'automatlc tension device, a pull-ofl" device between said threadclamp and the automatic tension device for -pulling off thread inthe-rear of the thread-clamp means located in when the automatic tensiondevice is in its inefi'ective position, and automatic means for.

rendering said thread-clampin and pull-off devices successivelyeffective 1n the order named on the completion of said group 01"" vstitches.

19; A sewing machine, comprisingimeans for forming a group of stitchesan automatic tension device, a work -holder, a con-: trolling rod, andmeans for automatically shifting said rod to its operative position on pthe completion of said group of stitches, in combination with thefollowing instrumen+ talities governed b controlling. rod ansuccessively efiective. in

device in the rear of said thread-clamp.

said movement of the y the order named viz.-a thread-clamp, inde pendentof said tension device anda pull-off 20. Asewing machine; comprisingmeans a for "forming a group of stitches, an automatic tension device,awork-holder, a controlling rod, and means for auotmatically shiftingsaid .rod to its operativeposition on the completionof said oup ofstitches, in combination with the idllowing instruxmentalities verned bysaid movement of said control ing rod and successively effective in theorder named vim-a thread-clamp, means forreleasin said automatic tensiondevice, andapull-o device betweensaid automatic tension device andthread-clampQ 21. A sewing machine, com rising means a for forming agroup of .stitc es, an automatic tension device, a work-holder, a controll ng rod, and means for automatically 13o [shifting said rod to itsoperative position cup of stitches,

on the com letion of said in combinaiton with the ollowinginstruinentalities governed by said movement of the controlling rod andsuccessively efiective in the order-named viz.a thread-clamp inde endentof said tension device, and a chec spring for pulling back the thread atthe needle after the thread has been severed.

22. A single thread sewing machine, comprising means for forming a groupof stitches .said means including a needle, a workholder, a thread-clampto positively clamp the thread located adjacent to and above the needleand substantially in vertical alinement with it, a pull-off device forpulling ofi thread in the rear of said thread-clamp, means for renderingsaid thread-clamp and pull-off device successively effective on thecompletion of said group of stitches, and

means for raising. the work-holder while the thread-clam is in'efiective position to sever the three at the under side of the work.

23. A sewing machine comprisi stitch forming means, a thread tension, ana pair of complemental thread breaking devices both located above thework, mechanism for actuating the stitch forming means, connectionsbetween the actuating mechanism and one of said devices for actuatingthe latter, and connections for manually operating the other of saiddevices. v

Signed at Cleveland, in the county of Cuyahoga, and State of Ohio, this14th day of May A. D. 1912.

GEORGE W. NELSON. Witnesses:

CHAS. C. EMMONS, H. R. KNAPP;

